Ethereum indexer fails on startup when block.data is created as directory

[MrLutik]

Description

The Ethereum indexer fails on startup with the following error:

ERROR tasks/block.go:118 tasks - BlockManager - set last block - write to file
{"error": "open /srv/block.data: is a directory"}

Root Cause

When Docker Compose starts with the volume mount:

- "./worker/ethereum/sai-ethereum-indexer/block.data:/srv/block.data"

If the source path does not exist on the host, Docker creates it as a directory instead of a file. The indexer expects a regular file to store the last processed block height.

Affected Code

• worker/ethereum/sai-ethereum-indexer/tasks/block.go:116 - ioutil.WriteFile() fails when path is a directory
• Volume mount in docker-compose configuration

Workaround

rm -rf ./worker/ethereum/sai-ethereum-indexer/block.data
touch ./worker/ethereum/sai-ethereum-indexer/block.data
docker compose restart ethereum-indexer

---

[Liver-23]

Ideally, to restart

docker compose -f /home/km/sekin/compose.yml stop ethereum-indexer
docker compose -f /home/km/sekin/compose.yml rm -f ethereum-indexer
docker compose -f /home/km/sekin/compose.yml up -d ethereum-indexer